Tubular floor structure



(No Model.) 2 Sheets-Sheet 1 F. 'SOHMEMANN.

TUBULAR FLOOR STRUCTURE.

Patented Aug. 26, 1890.

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(No Model.) 2 Sheets-Sheet 2.

F. SOHMEMANN. TUBULAR FLOOR STRUGTURB.

No. 435,155. Patented Aug. 26, 1890.

In J %I i 1i i A w MW I (fa f A a! h I b i" '0 H v a a 1 k w P: Q J R MH Qrmzssas: SINVENTOR: as M of the city of Philadelphia and State ofPennof the main tubular girders with the ends of UNITED STATES PATENT OFICE.

FRIEDRICH SOHMEMANN, OF PHILADELPHIA, PENNSYLVANIA.

TUBULAR FLOOR STRUCTURE.

SPECIFICATION forming part of Letters Patent No. 435,155, dated August26, 1890.

Application filed anuary 6, 1890.

Serial no. 336,11 1. on model.)

To all whom it may concern.-

Be it known that I, FRIEDRICH SCHMEMANN,

sylvania, have invented a certain 11 ew and useful Improvement inTubular Floor Structures; and I do hereby declare the following to be afull, clear, and exact description thereof, reference being had to theaccompanying drawings, forming a part of this specification.

My invention has relation to tubular floor structures; and it consistsin the construction of flooring hereinafter particularly described. v

The object of my invention is to produce a light, rigid, and inexpensivefloor structure of uniform strength.

I will now describe my invention, so that others skilled in the art. towhich it appertains may make and use the same, reference being had tothe accompanying drawings, forming part of this specification.

Figure l is a front elevation showing one the concrete arches shownbuilt upon the horizontal T-plates hereinafter described. Fig. 2 showsone of the cross tubular girders. Fig. 3 is a plan view showing thecombination .of the main tubular girders and the cross tubular girderstogether with the intersecting pipe-braces. Fig. 4 is a sectional Viewshowing the castings and connections of the main girder with thecross-girder. Fig. 5 is a sectional view of the end castings of the maingirder. Fig.6 is a sectional view of the sleeve-castingat-theintersection of the upper and lower arch chords, and applieseither to the main or cross girder.

The construction of the tubular reversed arch in the girder hereindescribed is substantially similar to the construction of the barereversed-arch chord shown in the Letters Patent No. 314,728, issued tome March 31, 1885, and of the metal purlins shown in my application forLetters Patent of the United States, Serial No. 333,816, for improvementin arch-pipe trusses for roof structures.

A is the upper arched chord of the girder.

B is the lower reversed-arch chord.

A A are the tangents, which are continuous with the upper arched chordA.

B B are the tangents which are connected by fittings with the lowerreversed-arched chord.

O O are the shoe-castings or the bearings of the main girder, in whichthe tangential ends A A fit and are secured by means of the lock-nuts c0, turned on the screw-threads provided on the ends of the tangentialchords A A The tangential ends B B are secured to the castings F F bymeans of the locknuts f f, turned on the screw-threads provided on theends of the tangential chords B B Secured also to the chord B B by thesleeve-castings f f at the casting F 1s an upper horizontal chordEbetween the two end castings F F. The castings F F are mounted onvertical posts P P, which are secured to and mounted upon theshoe-castings C O.

G G are the castings at the intersection of the arched chords A B andthe tangential ends A A B B in which A A A are continuous, and thetangential ends B B are connected with the arched chord B byscrewfittings. These upper and lower chords. A A A B B B and the upperhorizontal chord E, when itis employed, are intersected and connectedtogether by vertical posts 19, through the medium of the sleeve-fittingsp. These fittings are screwed on the ends of the vertical posts p andslipped loosely on the chords which they connect. The main girders arepreferably constructed double, composed of two series of tubularconnections and fittings. The cross-girders are of a constructionsubstantially similar to the main girder described, and connected withthe main girder, as shown in the sectional view, Fig. 4, and in the'plan View, Fig. 3, by the mutual fittings and pipe-posts. The ends ofthe cross-girders are connected and secured, as shown in said Figs. 3and 4, to the main girders between them and at right angles thereto atdesired intervals. The cross-girders are laterally braced by thepipe-braces 16, running from Wall to wall.

W'hen it is desired to employ or build in concrete arches instead ofmerelylaying a wooden or plate flooring immediately upon the structure,as described, wrought -iron plates T are suspended longitudinallybeneath the crossgirder through the medium of inverted-U bolts U, whichare looped or secured over the chord of the upper arch of thecrossgirder, the ends depending and passing through the iron plates T,which secures the said plate in the position shown in the drawings bymeans of the nuts n provided on the ends of the said inverted-U bolt. Onthese plates the abutments of the concrete or brick arches are builtfrom one plate to the other, each arch connecting one with the other. Inthis way a most solid, substantial, and fireproof structure is provided.When the brick or concrete arches are employed as described, the upperhorizontal chord E which is shown in the drawings may be dispensed with.

Having thus described my invention, what Iclaim, and desire to secure byLetters Patent, is-

1. In a floor structure, the combination of main tubular reversed-archgirders with cross tubular reversed-arch girders, said cross tubularreversed-arch girders provided with horizontal suspension-plates, andbrick or masonry arches constructed upon said horizontalsuspension-plates, substantially as hereinbel'ore set forth anddescribed.

2. In a floor structure, two or more main tubular reversed-arch girders,in combination with other tubular reversed-arch girders set at rightangles to the main girders, between said main girders and connectedtherewith, and tubular pipe-braces connecting and supporting saidcross-girders, substantially as hereinbefore set forth and described.

3. In a floor structure, two or more main tubular arched girdersprovided with an upper horizontal connecting-chord, in combination witha series of cross connecting tubular arched girders provided with upperhorizontal connecting-chords secured to and connecting the main girdersand tubular pipe-braces connecting and supporting the cross-girders,substantially as hereinbefore set forth and described.

4. In a floor structure, main reversed tubular arched girders, incombination with a series of cross tubular arched girders provided withhorizontal lower suspension-plates, said cross-girders secured atrightangles to the main girders and connecting the same, and brick orconcrete arches built or constructed upon the said horizontalsuspension-plates,

\ the whole forming a continuous solid structure, substantially ashereinbefore set forth and described.

5. In afloor structure, in combination with main reversed tubular archgirders, cross tubular girders connecting said main girders and set atright angles thereto, tubular pipebraces, and flooring plates or planks,substantially as hereinbefore set forth and described.

6. In a floor structure, the combination, with the doublereversed-arched girders having the reversed-arch chords A B and thetangential ends A A B B and an upper horizontal chord E, of thecrosstubular reversed-arch girders having also the tubular reversed-archchords A B and tangential ends A A B B ,an upper horizontal chord E, andtop flooring set upon said horizontal chords E, substantially ashereinbefore set forth and described.

7. In a floor structure, two or more double tubular reversed-archgirders having the reversed-arch chords A B, and the tangential ends ofthe said arch-chords A A B 8 secured to the upright posts P I, incombination with cross tubular reversed-arch girders set at right anglesto said main girders between said mai'n girders and secured andconnected therewith, said tubular cross arched girders provided withreversed-arch chords A B, and tangential ends A A B B connected withvertical post-s P P, horizontal plates T, secured to said cross-girdersrunning horizontally underneath the same, masonry arches built betweensaid cross-girders resting and abutting upon the horizontal plates T,and said arches connecting one with another, substantially ashereinbefore set forth and described.

8. In a floor structure,two or more tubular girders having theupper-arch chord A, provided with tangential ends A A and lowerreversed-arch chord B, having the tangential ends B B secured andconnected to the vertical posts P P, through the medium of shoecastings(J C and F F, the vertical connecting-posts 1), connecting said upperand lower chords by means of sleeve-fittings, in combination with crosstubular girders secured between the main girders'at right angles theretoby means of screw and sleeve fittings, horizontal plates T, attached andsecured longitudinally with and underneath said crossgirders, brick orconcrete arches provided between said cross-girders resting or abuttingupon said horizontal plates T, substantially as hereinbefore set forthand described.

In witness whereof I have hereunto set'my hand this 4th day of January,A. D. 1890.

FRIEDRICH SCHMEMANN.

Witnesses:

HORACE PETTIT, REESE M. FLEISCHMANN.

IIO

